/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncCore/Source/ConcertSyncCore/Public/ConcertSyncSessionDatabase.h
Add a package event ID for the head revision to the persist events in this database, if not already existing.
True if the persist event was added, false otherwise.
bool AddPersistEventForHeadRevision ( [FName](API\Runtime\Core\UObject\FName) InPackageName, int64 & OutPersistEventId )